From d1e187baf1abd0be2201b0838785ab951f1f76fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Rzepecki?= <divided.mind@gmail.com>
Date: Fri, 4 Sep 2026 06:30:19 +0200
Subject: [PATCH] ci: Cancel in-progress workflow runs on branch push

Add a `concurrency` block to the top-level configuration of the lint
and test workflow. This groups runs by workflow and branch reference
(`${{ github.workflow }}-${{ github.ref }}`) and enables automatic
cancellation of active runs on any push (`cancel-in-progress: true`),
while keeping the `main` branch protected from cancellation.

Assisted-by: Gemini CLI:gemini-3.5-flash
---
 .github/workflows/ci.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 80518cf..a1dc282 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,6 +2,10 @@ name: Lint and test
 
 on: push
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 jobs:
   build-and-lint:
     runs-on: ubuntu-latest